import {Injectable} from '@angular/core';

@Injectable()
export class WebsocketHelpers {

  public static isPresent(obj: any): boolean {
    return obj !== undefined && obj !== null;
  }

  public static isString(obj: any): boolean {
    return typeof obj === 'string';
  }

  public static isArray(obj: any): boolean {
    return Array.isArray(obj);
  }

  public static isFunction(obj: any): boolean {
    return typeof obj === 'function';
  }
}
